Hi,
some time ago there was a thread "Sparklan WPEA-121N AR9382 168c:abcd" about
the issue that the mentioned device was erroneously reported as device ID
0xabcd. There were EEPROM issues assumed and BIOS issues reported that could
cause this effect (by resetting the PCI bus at system power on) and a proposed
workaround to add the wrong ID to the driver to make it load - it had been
reported working.
I'm facing such a situation with embedded devices (I assume BIOS updates
probably are at least very difficult) and a WPEA-127N and would like to know
whether there were new findings and share mine in case they'd be of some
interest.
Are there any news on that?
Is the proposed workaround adding 0xabcd to the driver still best way of
handling this?
On my board it happens /from time to time/ that the device reports 0xabcd - but
not always.
I made 20 tests were I saw 4 such failures. All those failures appeared after
cold boot, but none after warm boot. After cold boot sometimes one of two
installed devices appeared with wrong device ID but other correctly, and at
other times both were working. Of course the number of tests is insufficient to
draw conclusions, I write it just in case it rings a bell.
It is some Intel atom board running Linux (for example, Debian 7). Can I
provide information that could help (and if so, how do I get those)?
Best regards,
Steffen
Some test results:
root@nomad:~# lspci|grep -i ath
01:00.0 Ethernet controller: Atheros Communications Inc. Device abcd (rev 01)
07:00.0 Ethernet controller: Atheros Communications Inc. Device abcd (rev 01)
root@nomad:~# grep ''
/sys/devices/pci0000:00/0000:00:1c.*/0000:0{1,7}:00.0/{vendor,device}
/sys/devices/pci0000:00/0000:00:1c.0/0000:01:00.0/vendor:0x168c
/sys/devices/pci0000:00/0000:00:1c.0/0000:01:00.0/device:0xabcd
/sys/devices/pci0000:00/0000:00:1c.2/0000:07:00.0/vendor:0x168c
/sys/devices/pci0000:00/0000:00:1c.2/0000:07:00.0/device:0xabcd
root@nomad:~# reboot
[ssh...]
root@nomad:~# lspci|grep -i ath
01:00.0 Network controller: Atheros Communications Inc. AR9300 Wireless LAN
adaptor (rev 01)
07:00.0 Network controller: Atheros Communications Inc. AR9300 Wireless LAN
adaptor (rev 01)
root@nomad:~# grep ''
/sys/devices/pci0000:00/0000:00:1c.*/0000:0{1,7}:00.0/{vendor,device}
/sys/devices/pci0000:00/0000:00:1c.0/0000:01:00.0/vendor:0x168c
/sys/devices/pci0000:00/0000:00:1c.0/0000:01:00.0/device:0x0030
/sys/devices/pci0000:00/0000:00:1c.2/0000:07:00.0/vendor:0x168c
/sys/devices/pci0000:00/0000:00:1c.2/0000:07:00.0/device:0x0030
root@nomad:/sys/devices/pci0000:00/0000:00:1c.0/0000:01:00.0# grep '' *
broken_parity_status:0
class:0x020000
Binary file config matches
consistent_dma_mask_bits:32
device:0xabcd
dma_mask_bits:32
enable:0
grep: firmware_node: Is a directory
irq:10
local_cpulist:0-31
local_cpus:ffffffff
modalias:pci:v0000168Cd0000ABCDsv00000000sd00000000bc02sc00i00
grep: power: Is a directory
grep: remove: Permission denied
grep: rescan: Permission denied
grep: reset: Permission denied
resource:0x00000000fdfe0000 0x00000000fdffffff 0x0000000000140204
resource:0x0000000000000000 0x0000000000000000 0x0000000000000000
resource:0x0000000000000000 0x0000000000000000 0x0000000000000000
resource:0x0000000000000000 0x0000000000000000 0x0000000000000000
resource:0x0000000000000000 0x0000000000000000 0x0000000000000000
resource:0x0000000000000000 0x0000000000000000 0x0000000000000000
resource:0x00000000fdfd0000 0x00000000fdfdffff 0x000000000004e200
resource:0x0000000000000000 0x0000000000000000 0x0000000000000000
resource:0x0000000000000000 0x0000000000000000 0x0000000000000000
resource:0x0000000000000000 0x0000000000000000 0x0000000000000000
resource:0x0000000000000000 0x0000000000000000 0x0000000000000000
resource:0x0000000000000000 0x0000000000000000 0x0000000000000000
resource:0x0000000000000000 0x0000000000000000 0x0000000000000000
grep: resource0: Input/output error
grep: rom: Invalid argument
grep: subsystem: Is a directory
subsystem_device:0x0000
subsystem_vendor:0x0000
uevent:PCI_CLASS=20000
uevent:PCI_ID=168C:ABCD
uevent:PCI_SUBSYS_ID=0000:0000
uevent:PCI_SLOT_NAME=0000:01:00.0
uevent:MODALIAS=pci:v0000168Cd0000ABCDsv00000000sd00000000bc02sc00i00
vendor:0x168c
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